<template>
    <fieldset>
        <legend>tab切换</legend>
        <button v-for="btn in buttons" :key="btn" @click="handle(btn)" :class="['tab-button',{active:btn===selectBtn}]">{{btn}}</button>
        <div class="tab" :is="dynamic"></div>
    </fieldset>
</template>


<script>
import emailCom from "./email-com.vue"
import homeCom from "./home-com.vue"
import mineCom from "./mine-com.vue"



    export default{
        data(){
            return {
                buttons:['email','home','mine'],
                selectBtn:"email"
            }
        },
        components:{
            "email-com":emailCom,
            "home-com":homeCom,
            "mine-com":mineCom
        },
        methods:{
            handle(btn){
                this.selectBtn = btn
            }
        },
        computed:{
            dynamic(){
                return this.selectBtn+'-com'
            }
        }
    }
</script>




<style scoped>
    .tab-button {
        padding: 6px 10px;
        border-top-left-radius: 3px;
        border-top-right-radius: 3px;
        border: 1px solid #ccc;
        cursor: pointer;
        background: #f0f0f0;
        margin-bottom: -1px;
        margin-right: -1px;
    }



    .tab-button:hover {
        background: #e0e0e0;
    }
    
    .tab-button.active {
        background: hotpink;
    }
    
    .tab {
        border: 1px solid #ccc;
        padding: 10px;
    }
    h1 {
        margin:0;
    }

</style>